Repeat device for automatic phonographs



June 13, 1950 s, STQLBERG 2,511,604

REPEAT DEVICE FOR AUTOMATIC PHONOGRAPHS Original Filed July 30, 1945 5Sheets-Sheet l INVENITOR.

. zilla June 13,. 1950 v s. A. SITOLBERG 2,511,604

' REPEAT mavxcs: FOR AUTOMATIC PHONOGRAPHS Original Filed July so, 1945s Sheets-Sheet 2 Sec nofe onFgST 2.8 m 40 IE! 6 as I as .37 46 22 24 25V 26 E8 .4: INVENTOR.

svenAfiT lber' June 13, 1950 s. A. STOLBERG 2,511,604

REPEAT DEVICE FOR AUTOMATIC PHONOGRAPHS Original Filed July 30, 1945 3Sheets-Sheet 3 Alm yisifion of pin To erm'gj' N manual release ofrecordby b on 4).

IN VEN TOR.

i venAfiTolber' \IQQAQQA Patented June 13, 1950 1 25115045 REPEAT DEVICEFORAUTOMATIC" PHONOGRAPHS Sven A. Sto l bergChicago, I111," assignor; by'mesne assignments, to Raytheon Manufact i'rin'g' Com pany, Newton,Mass, a corporation of'Delaware Original application July 307194 5Serial No. 7

607,878. Divided and this'applicationAugust 6, 1945, Serial No. 609,101

i Claims. c1. 274-10,)

This l invention relates to repeat devices for record-changers, and thelike. These. recordchangers are intended to play conventional disk typerecords, and are so devised that when each record has been played thedevice will or may automatically operate to deliver a new or unplayedrecord into playing position, and to shift the tone-arm back and forthas well asraising and lowering said tone-arm in correct manner .to

bring the stylus into engagement with the .be-. ginning of the soundtrack of such new record. These and other operations are performed inproper sequence and automatically by the mechanisms provided for suchpurposes in the normal functioning of the device. There arise times,howevenwhen it is desired to re-play or repeat a given record already inplaying position. When such repeating is desired the mechanism should besofunctionedthatvarious of the normal op-. erations, such astone-armshifting back to the beginning of the sound track, and lowering of. thestylus into engagement with the sound track, will be performed in propersequence and automatically, at least as far as such sequence isconcerned; but the record feeding mechanism by which the new record issupplied in playing position should be so conditioned that it will notthenfunction, but will remain inoperative during the cycle ofmovementsbetween the. first It is a prime object of the presentinvention to provide means whereby such repeating action will beensured, under control of the operawith which the devices of the presentapplication are usable.

The foregoing general type. of record feeding device-is also usuallyassociated with means to support vthe lateral or edge portions of theunplayed records in such .elevated position, such edge supporting meansfunctioning in conjunction with thevshoulder supportfor thecentralportions. of the records .When such edge. support. is. providedthe lateral shifting meansrfor releasing thelowermost record intoplayingpo sition may, well. be.,.associated with such edge supporting means.Said lateralshiftingmeansmay take the form of, reciprocable meansadapted tor, when the repeat device is placed in its res peatingposition, but whereby when the repeate ing device is in itsnon-operative position the releasing action will be produced normally, anew. record being introduced into playing position at the proper stageof the cycle of operations.

usable in connection with that type of recordchanger in which theunplayed records are strung onto the upper portion of a center post andabove the turntable, and above any previous records ally during therecord releasing operation. De-.-..

vices of this general type are well known in. the present art, and Imention them as examples of meansfor delivering or permittingdelivery-of records to playing position, and. in connection topressagainst the edge of the lowermostwune. played record, shifting,said record sufficiently to ensure properrelease ofsuch record. t Y

:.In my co-pending application for patent. on im-' provements inRecord-changing phonographs and the like, Serial No. 576,202, filedFebruary, 5,. 1945, and assigned to the same assigneeas the. presentapplication, I have disclosed a releasing mechanism operatingon thegenerallines .above explained, said releasing mechanism there takes thegeneral form of a rock arm pivotally mounted within, a stand provided onthe edge portion of the supporting table, and having the upper portionof this rock-arminposition to engage the edge of, the lowermost recordwhen such rock playing of the record and the re-playingthereof.

is.retracted or moved tov its outward position; (away from the centerpost); said upper por-.. tiOnof such rock arm serving to afterwardspressthe edge portion of the record inwardly towards; the centerpost andthuscause record release at the proper time in the cycle of operations.Fun thermore, in thatapplication I have provided a spring or yieldableconnection to said rock arm from the actuating device, so that in normal11;, conditions, when a record is to be released, suchv Specifically,the present repeating device is spring .will transmit operating force tothe rock; armand cause it to rock in releasing direction; However, byblocking such rock arm in case it isdesired to produce a repeatingoperation, the operating devices may function at their intended times,but the rock arm willnot function, the spring or other yieldableconnection yielding at such time to. permit such repeating operationto'occur. The blockingdevice disclosed in that application to producesuch repeating operation is located directly in the stand wherein orwhereon the rock arm is also carried. Said blockingdevice alsocomprises, in that application, a rock element journalled directly inthe stand and 00- operating with the rock'arm to block such rock armwhen repeating is desired, and permitting said rock arm to. rock. freeof such blocking ele-; ment when normal releasing function is to be.permitted. a n V In mycwpending application for Repeat .de-w

ing means. In this case, also. however, such blocking means is carrieddirectly'by or on or in the stand whereby said rock arm is carried; andin this case said blocking means operates directly on the upper endportion of the rock. arm

whereby the record is released, and said blocking element in this caseis carried by the rock arm itself and rocks back and forth with saidrock arm.

The blocking means disclosed in said first mentioned application, SerialNo. 576,202, is carried by 'ormounted on or hithe stand wherein the rockarm is pivoted, but said blocking: meansfunctions' directly on the rockarm itself to produce the blocking effect, such action being pro--"duced by extending said blocking elementthrough. anopening in the rockarm.

The present application discloses a blocking, element for blocking. therocking of the rock arm. for-repeat purposes, which element is carried.by or on the table which carries the principal operatdevices of. therecord-changer, said blocking. element acting. directly on the lowerend. portion of such rock arm. In this application, also, I. have hereindisclosed a remote control for said. blocking element, so that the samemay be shifted between its. blocking. and non-blocking positions from aremote position, away from the stand whereon said rock arm is pivoted,such remote control device being located at a position where;

itis: convenient for manipulation by the operator, and near the front ofthe table.

Said remote control device is also so formed that when it. is moved tothe repeating position, it. is self locking, so that it cannot becomeunintentionally moved back to its non-blocking position; but such returnto non-blocking position willreadily occur by proper manipulation oftheremote control itself.

A further feature of the present application relates to provision of amanual or supplemental meansto rock the rock arm of the record-feedingonto-leasing mechanisms soas-to make possible a manual. release of thelowermost record. In this. connection I have provided a supplementalactuating element whereby the. rock arm may be rocked in the recordreleasing direction, and I have provided a manual. control element forshifting such actuating element in the record releasing. direction.Normally this supplemental actuating element stands. inanon-actuatingposition, but by shifting it. momentarilyin the recrd;releasing direction it serves to rock the rock arm,.thereby releasing arecord. Another shifting of this, actuating. element will. release. a.further record, and thus the records may be man ually' released one.atatime by this supplemental actuating. element, said element beingmoved back. to. its normal or non-releasing. position after. each recordreleasing operation- Specifically, the present application discloses. anactuating. element which, whenshifted in one; direction, serves to blockthe. rocking movement of. the rock arm, thereby ensuring a repeatoperation; and which, when shifted in. the op-' posite direction, servesto: efiect release: of the. lowermost record, and irrespective of anynecessary actuation. of the. usual actuating element.

The devices herein disclosed are also. disclosed. in; a copending.application forimprovements in Record-changers, Serial No. 607,873,filed July 30, 1945, and of which applicationthe present application isa division. 4

Other objects and uses of the invention will appear from a detaileddescription of the same, which consists in the features of constructionand combinations of parts hereinafter described and claimed.

in the drawings:

Figure 1 shows a plan view of a typical recordchanger embodying thefeatures of the present invention, certain of the repeat devices whichare below the table being shown in dotted lines to show the manner inwhich they are related to the turntable and to other elements of thestructure;

."Figure 2 shows schematically the-principaloperating parts of therepeat mechanisrri proper... together with the outlines of the,one-cyclecam, and it' shows the remote control. in connection; with the"blocking: element; and in this figure; the parts are shownwith theremote control button in its. normal or non-interfering position;

Figure 3 shows a vertical section through a typical stand: whichismounted on the table, the

rock arm being rockinglymounted insaid: stand;

andin this figure the reciprocable bar which: nor-- mall'y permits: therock arm" tofunction", and cone tro'ls such. functioning. is in its;non-reciprocated position, and the blocking bar is also in its non--blocking. position b Figure 4' shows a view similar to that of Fi ure 3,but. with thereciprocable bar in itsre--- ciprocated. position. whereinit. permits. the rock, arm to rock for arecord releasing operation, theblocking bar being still in;,its: non-blocking position;

Figure 5 shows a: View similar to that of Figure: 2,. but with. the.remote" control'button and connections' shiftedv to their frepeatposition Figure 6 shows a view similar to: that of Figure 3,. but. withthe blocking bar in. its blocking. po-- sition' and Figure. I shows a.view similar to that of- Figure; 4, but. with the; blocking bar in.itsblocking p0:- sitiomso thattherock arm has not been rocked: in.this. figure, notwithstanding that the recipro'cable bar. has beemmoved:to its. record. releas ing. position.

In Figure 1; 13- have: shown. more or less sche maticallyarecord-cha-nger" embodying; the repeat device of; the:- present;-invention. In. Figure 1. the record-changer is; shown: as. provided.witln the table in on which the. principal elements of. the device. aremounted. lhese elements include the turntable l l', pivoted for rotationabout the-vertical. axis P2. The centerpost Bis-provided toree ceive therecords- This centerpost as shown: formed. with its. upperportion I4bent laterally andslanting down. to the shoulder t5 which: locatedadistance above the turntable suificie'nt to accommodate a number ofrecords in playing position, the top record of which series is the onewhich is to be played. The unpl ayed records have their central portionssupported by the shoulder. i5, and by aslightlateral. deflection of thelowermost unplayed record: that record is w leased: from theshoulder andallowed to descend into playing positioni- Arrangements of this kind arewell: known. and. understood. in. the present art.- i

The. tone-arm. i6 is; journalle'd'. to rock om the vertical. pivot ll:provided. by a: stand. carried. by the" table I0. Said. tone-arm may berockedioutwardly to-theposition. shown in Figure: 1 where said tone-armis clear of records on the turntable, and said tone-arm may also rockinwardly as the record is played until the inner or terminal end of thesound track is reached. Thereupon means are provided for driving aone-cycle cam 18 through a single revolution, during which revolutionsaid cam serves to raisethe tone-arm from the record face, rock saidtone-arm outwardly to its extreme position as shown in Figure 1, releasea new record for descent to playing position, and swing the tone-arminwardly to position above the outer or beginning end of the sound trackof such so-lowered record, and then lower the tone-arm to bring thestylus into engagement with the sound track of the record. Thereafterthe playing of such new record commences and proceeds to conclusion,whereupon the cycle is repeated.

Machines capable of operating on the foregoing principle are well knownin this art, and it is not deemed necessary to illustrate the details ofconstruction more fully than shown herein, for the foregoing reason.However, it is here noted that these mechanisms include means to shiftthe lowermost record of the unplayed group, supported by the shoulderand supported by edge support, laterally sufficiently to release suchlower most record to permit it to descend into playing position. Suchmeans is carried by the stand l9 which is supported by the table Ii]substantially in alignment with the opposite side of the centerpost fromthe shoulder 15; and said stand also includes in some cases a supportfor the edge portions of the unplayed records. The means for causingsuch lateral shift of the lowermost record includes the arm 20,contained within the stand l9, said arm being journalled to rock on thecross pin 2i carried by the stand. Such rocking movement carries theupper end portion 22 of the rock arm towards the right as viewed inFigures 3, 4, 6 and 7; and the edge portion of the lowermost record issupported either directly by the top portion 23 of the stand or by anelement which is in turn carried by the stand; but in either case theupper portion 22 of the rock arm serves to shift the edge portion ofsuch lowermost record laterally sufficiently to disengage said recordfrom the shoulder l5 and from the stand. In Figures 3, 6 and 7 the rockarm is shown in its normal position (that in which it is not shiftingthe record for disengagement) whereas in Figure 4 said rock arm is shownin its rocked position (in which it has shifted the record laterallysufficiently to cause record release).

This rock arm extends through a slot 24 'provided in a slidableactuating bar 25 which is carried by the bottom of the table inconvenient manner. The normal position of the bar 25 is that shown inFigures 3 and 6 wherein said slot 24 engages the rock arm in such manneras to retain the rock arm in unrocked position; that is, the normalpositions of these parts is that in which the left hand edge of the rockarm is engaged by the left hand extremity of the slot. A spring 26connects the lower end 21 of the rock arm with a tail 28 on the endportion of the bar 25, so said spring always tends to retain the slidebar and rock arm in the relative positions shown in Figures 3 and 6 (andalso Figure 4). Thus, by shifting the bar 25 endwise towards the leftthe lower end of the rock arm will follow such shift, and cause said armto rock into the position of Figure 4 to thereby shift the lowermostrecord laterally for disengagement and descent. -On the contrary, .bymerely blockingthe rocking move nie'nt of 'the' rock armand thuspreventing said rock arm from'following the movement of the bar assaidbar is shifted, the rock arm will remain unmoved, even when the bar isshifted, the spring 26 extending to permit of such action.

The sliding movement'of the bar 25 is produced in suitable manner, butharmoniously with the cycle of movements needed during a recordchangingoperation. In the arrangement shown a spring 29 connected to the bar andto a suitable other part tends to draw the bar inwardly (that is,towards the right in Figures 3, 4, 6 and 7). A triangular plate 30 ispivoted to the table at the point 3|, so said plate may be rockedthrough an angle determined by the slot 32 formed in said plate andthrough which slot there extends the pin 33 carried by the table. Thispin and slot arrangement limits the inward movement of the slide 25under the force of the spring 29, the triangular plate being connectedto the slide by the pin 34. Said triangular plate overlies the edgeportion of the one-cycle cam l8; said plate being provided with theflange 35 which reaches downwardly towards the cam; and a stud 36carried by'the cam will wipe against this flange to rock the triangularplate outwardly against the force of the spring 29 at the proper time inthe cycle of movements, releasing said triangular plate for restorationto its normal position when such wiping action has been completed.

It is now seen that normally the rock arm is rocked at the proper timein the cycle of cam movements to ensure correct release of the lowermostrecord into playing position. I shall now show how such rocking movementmay be interfered with and prevented, if desired, to thereby prevent arecord release, and thus to cause the cycle to be completed withoutbringing a fresh record into playing position. This will ensurerepeating operation as desired. To this end the following means have benprovided:

Reference to Figures 3, 4, 6 and 7 shows the presence of a second slidebar 3'! below the table 10 and above the main slide bar 25. This secondslide bar 31 is provided with the slot 38 through which the lower endportion of the rock arm 20 passes, said slot 38 being long enough toprovide for normal rocking of the rock arm without interference from thesecond slide, when said slide stands in the position of Figures 3 and 4;in which figures the second slide bar has been moved to its normal ornon-interfering position leftwards, so that the right hand end of saidslot 38 comes just to the position normally occupied by the rock arm (oreven to the right of such position), whereas, by moving the second slidebar 31 to the right to the position shown in Figures 6 and 7 the lefthand end of said slot 38 lies against the edge of the rock arm, thusinterfering with rocking moving of said rock arm from its normalposition (of Figures 3, 6 and '7). In other words, this second slide bar31 has two positions; that of Figures 3 and 4, which is anon-interfering or normal operation position, and that of Figures 6 and7, which is an interfering or repeat position.

' At this point, it is mentioned that the lower portion of the rock armis preferably provided with the notches 39 and 40 into which the slidebars 25 and 31 seat, said notches serving to ensure that engagements ofthe slide bars with the rock arm shall always be ensured at the bottomsof said notches, thereby ensuring that such engagements shall always beat the same conditions of rocking position of the rock arm 20; and saidnotches also prevent any tendency of the slide bar's't6-shifteither upor down along the-rock arm due to transmission of forces betweensaidrockarm-- and the respective slides.

Reviewing the operations of the slides ascompared: to the rock arm wefind the following conditions:'

In Figure 3 the main or operating slide stands at its right hand limitof movement, leaving slot clearance at its right hand slot end, so thatthe rock arm is held by the spring 26 in its normal position; in thisfigure also the second or blocking slide stands in its left hand ornon-interfering position, so that the slot of said second slide has itsright hand end in. engagement with the edge ofthe rock arm, and there isclearance between the left hand end of said slot 38 and the rock arm;Thus there is clearance available inthe second. slide to allow the rockarm to rock for record release, and the spring 26 is tending to causesuch rocking of the rockarm, but such rocking is revented by engagementof the left hand end of the slot 24 with the left hand edge of the rockarm. Leaving the second slide in this same position, but shifting themain slide 25 towards the left to the position of Figure 4 also carriesthe slot 24 to the left, and permits the spring 26 to draw the rock armover into the position of Figure 4 for a record releasing operation.This is the norinai operation.

Again assuming the main slide25 to be in its right hand or initialposition, but assuming the second slide 3'8 to be moved to the rightinto the position of Figure 6, it is seen that both of the slots of bothslides have their left hand ends in engagement with the left hand edgeof the rock arm, so that said rock arm is held by both slides againstrocking under the influence of the spring 26. If now the main slide beshifted to the left to the positionof Figure 7, such shifting being dueto wiping of the stud 36 against the flange 35 of the triangular plate,during the onecycle cam rotation, still suchleftward shift of the mainslide will not produce any rocking of the rockarm since the second slideis in such position. as to prevent such rocking of said rock arm. Thusno record release will occur, and a repeat operation will be produced,notwithstanding the normal functioning of the main slide.

The setting of the second slide in either of its two intended positions(either for non-interferonce, or for interference), may be produced. inany convenient manner. In the arrangement shown in the drawings I haveprovided a button 4| mounted onthe upper end of a short shaft 42 whichextends through and is journalled to the table in at a convenientlocation, Such location is shown at the front left hand corner of retable, close to the turntable. A short crank arm 43 is carried by thelower end of the shaft 42, and suitable stops 44 and 45 may be providedon the table to limit the rocking movements of this crank arm. A leverarm 46 is pivoted to the bottom of the tableon the pivotal mounting 41,for rocking movement; and a link 48 connects the crank arm 43 with oneend of said lever arm by means of the pin 49 at one end of said link anda pin 58 at the other end of said link. The free end of this lever arm45 connects to the second slide 31 by means of a pin and the pinconnections, especially between the lever arm 46 and the second slide31, are free enough to allow for the slight change of angularity andlengths due thereto during the slight rocking movements of the lever arm46 in setting the same from one position to the other position.

- conveniently the button 4| may be rovided witlrapointer fitwhichcooperates with suitable markings;or.-'-in'di'cia 53- provided on theface of the table, so: that the. operator will b informed as to theposition to which said button has been set.

The stops 44 and serve to limit the rocking movements ofthecrank arm 43and the button M. It is noted that the stop 45 may be so placed, asshown; in Figures 2 and 5, that when the button M is movedto the repeatposition the link 4B'moves-sl-ightly past dead center as compared.torthe crank 43, sothat no amount of force exerted endwise by the link48 (due to tendency. of the rock arm 20 to rock) can cause the crank- 43and button 4! to move away from such repeat position, but such movementsaway from the repeat position must be intentionally caused byintentional rotation of the button or the; crank itself,

It will be noted that by rocking the button counterclockwise to carrythe link 48 to a different position than that shown in Figures 1 and 2,.the arm 46 will also be rocked to carry the bar 31 towards the left inFigure 3, thus tilting the rock arm 20 to the record releasing positionof Figure 4. Such special movement will also entail movement of theslide 25 towards the left to the position of Figure 4 (it being notedthat the spring 26 will keep the slide 25 and the lower end of the rockarm 20 in the relative positions shown in Figures 3 and 4); and suchleft hand movement of the slide 25 will cause yield of the spring 29.Such momentary special rocking of the rock arm 20 for a special recordfeeding operation will thus be effected by a backward orcounterclockwise momentary rocking of the button 4| beyond'the positionshown in Figure l.- Toenable such movement the stop stud 44 should, ofcourse, be set low enough down in Figures 2 and 5.to permit of suchspecial movement; but normally, and in case such special releasemovement is not desired, said stop stud '44 may be set in the positionshown in Figures 2 and 5.

Itisthus evident that by the disclosures herein set forth, the samebutton, 4! may be used either for a frepeat operation, or for a releaseoperation, or maybe left. in its non-operated position where it does notinterfere with the normal functioning of the record-changingmechanisms.

While lhave herein shown and described only a single embodiment of thefeatures of my present invention, still I do not intend to limit myselfthereto, except as I may do so in the claims to follow.

Iclainif' 1. In a record changing phonograph, a tumtable, means forsupporting a stack of records above said turntable including a standadjacent said turntable, ,means for moving a record from said firstmentioned means into playing position on said turntable comprising arock arm pivotally mounted to said stand, a reciprocally movable firstslide having a slot through which one end of said rock arm extends,resilient means interconnecting said one end of said rock arm and saidfirst slide so that the force required to move a record from said firstmentioned means to said turntable is transmitted from said first slideto said arm through said resilient means, means for actuating saidreciprocally movable first slide during a record changing cycle toeffect the transfer of a record from said first mentioned means, asecond slide mounted adjacent to said first slide and having a slottherein through which. saidone end of said rock arm extends,

the material at one boundary of said second slide slot being engageablewith said one end of said rock arm for blocking movement thereof in therecord releasing direction, and a plurality of notches in said rock armone for each of said slides thereby to retain said slides againstslippage along said rock arm.

2. In a record changing phonograph, a turntable, means for supporting astack of records above said turntable including a stand adjacent saidturntable, means for moving a record from said first mentioned meansinto playing position on said turntable comprising a rock arm pivotallymounted to said stand, a reciprocally movable first slide having a slotthrough which one end of said rock arm extends, resilient meansinterconnecting said one end of said rock arm and said first slide sothat the force required to move a record from said first mentioned meansto said turntable is transmitted from said first slide to b said armthrough said resilient means, means for actuating said reciprocallymovable first slide during a record changing cycle to effect thetransfer of a record from said first mentioned means, a second slidemounted adjacent to said first slide and having a slot therein throughwhich said one end of said rock arm extends, the material at oneboundary of said second slide slot being engageable with said one end ofsaid rock arm for blocking movement thereof in the record releasingdirection, and a plurality of notches in said rock arm one for each ofsaid slides thereby to retain said slides against slippage along saidrock arm, and remote control means to shift said second slide betweentwo positions in one of which it engages said rock arm and blocksmovement thereof in response to said resilient means, said remotecontrol means comprising a rotatable element movable between twopositions and a link connected between the rotatable element and saidsecond slide.

3. In a record changing phonograph, a turntable, a center post extendingupwardly from said turntable including a shoulder to support a recordeccentrically on said center post above said turntable, means forshifting said record laterally to bring it into concentricity with saidcenter post and to release said record from said shoulder so it may fallonto said turntable comprising a stand adjacent said turntable, means onthe upper portion of said stand to support the peripheral edge portionof said record when said record is eccentrically mounted on said centerpost and supported on said shoulder, a first movable member positionedat the upper portion of said stand and movable on a radial lineinterconnecting said center post and said stand to efiect lateralmovement of said record by engaging the peripheral edge thereof torelease it from said shoulder, a second reciprocally movable memberdisposed adjacent to said first movable member, yieldable meansinterconnecting said members to cause said first movable member tofollow the movements of said second movable member during a recordchanging cycle to effect the release of said record from said shoulder,and blocking means adjacent said second member for effectively blockingthe movement of said first member in response to movement of said secondmember, said blocking means being arranged to move parallel to saidsecond member between a normal position and a blocking or repeatposition and being provided with a portion extending across the path ofsaid first member, said portion firmly engaging said first member in therepeat position to prevent record-releasing movement of said firstmember through said yieldable means, so that repeating of the recordwhich has been played on said turntable is accomplished, wherein saidblocking means comprises a reciprocable member having a slot throughwhich the first movable member extends, the material at one boundary ofsaid slot being engageable with the first movable member for blockingmovement of said first mentioned movable member in record releasingdirection.

4. In a record changing phonograph, a turntable, a center post extendingupwardly from said turntable including a shoulder to support a recordeccentrically on said center post above said turntable, means forshifting said record laterally to bring it into concentricity with saidcenter post and to release said record from said shoulder so it may fallonto said turntable comprising a stand adjacent said turntable, means onthe upper portion of said stand to support the peripheral edge portionof said record when said record is eccentrically mounted on said centerpost and supported on said shoulder, a first movable member positionedat the upper portion of said stand and movable on a radial lineinterconnecting said center post and said stand to eifect lateralmovement of said record by engaging the peripheral edge thereof torelease it from said shoulder, a second reciprocally movable memberdisposed adjacent to said first movable member, yieldable meansinterconnecting said members to cause said first movable member tofollow the movements of said second movable member during a recordchanging cycle to effect the release of said record from said shoulder,and blocking means adjacent said second member for effectively blockingthe movement of said first member in response to movement of said secondmember, said blocking means being arranged to move parallel to saidsecond member between a normal position and a blocking or repeatposition and being provided with a portion extending across the path ofsaid first member, said portion firmly engaging said first member in therepeat position to prevent record-releasing movement of said firstmember through said yieldable means, so that repeating of the recordwhich has been played on said turntable is accomplished, wherein bothsaid second member and said blocking means comprise slides mountedadjacent to each other and provided with slots through which the firstmovable member extends, together with means to move one of said slidesbetween a normal position wherein the first movable member may move forrecord release, and a blocking position wherein the end of the slot ofsaid one slide blocks following movement of the first movable member tothereby produce a "repea operation.

SVEN A. STOLBERG.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,938,810 Collison et a1. Dec.12, 1933 FOREIGN PATENTS Number Country Date 316,852 Great Britain Aug.8, 1929 399,184 Great Britain Sept. 25, 1933

